CN104761896A - Damping ageing-resistant nylon composite material and preparation method thereof - Google Patents

Abstract

The invention discloses a damping ageing-resistant nylon composite material. The damping ageing-resistant nylon composite material is characterized by being prepared from the following raw materials in parts by weight: 2-3 parts of an antiager MB, 1-2 parts of an ethylene-propylene copolymer, 7-10 parts of active calcium silicate, 3-4 parts of benzotriazole, 0.5-1 part of barium stearate, 0.5-1 part of paraffin, 90-100 parts of nylon 6, 2.5-3.2 parts of lithium chloride, 3-9 parts of epoxy resin E51, 0.3-0.5 part of an antioxidant 1010, 0.5-1 part of sodium lignin sulfonate, 10-15 parts of EVA emulsion, 60-80 parts of ethyl acetate, 1-3 parts of castor oil, 4-7 parts of ethylene/ethanol copolymer powder and 15-30 parts of distilled water. The active calcium silicate added in the damping ageing-resistant nylon composite material disclosed by the invention improves the heat resistance, fluxing property and dielectric property of the product, and reduces the water absorption of the nylon. The nylon composite material disclosed by the invention is good in damping effect, capable of lowering a noise, good in ageing resistance, capable of delaying an ageing time, prolonging the service life and reducing the use cost, convenient to process, and capable of meeting the needs of large-scale production.

Description

Ageing-resistant nylon composite materials of a kind of damping and preparation method thereof

Technical field

The present invention relates to ageing-resistant nylon composite materials of a kind of damping and preparation method thereof, belong to nylon production technical field.

Background technology

Mud guard is just mounted in wheel outside framework plank frame below, is generally the manufacture of top-quality rubber material, also has employing engineering plastics.Mud guard can the fender function of protecting as body of a motor car; mud guard can be good at the vehicle body of the love car protecting you on using; reduce muddy water in the rainy day to splash; the rubble that can reduce on road flies out to the damage of car due to rolling of wheel; there is no mud guard; stone clod noise is large, is have certain damage to automobile.Mud guard must have easy for installation, heat-resisting, ageing-resistant, that surface not easily abrades, alleviates the aspects such as automobile dead weight requirement, but general fender does not possess these conditions.

Nylon 6 is a kind of widely used engineering plastics, there is excellent over-all properties, but also exist that strong alkali-acid resistance is poor, dry state and the shortcoming such as low temperature impact strength is low, water-intake rate is large, and the processing temperature of nylon 6 is higher, improve production cost, high to the requirement of production unit, be unfavorable for scale operation.The low melting point nylon 6 sold in the market is mainly prepared by the method for synthesis by external company, there is complete processing complexity in the method, the shortcomings such as cost is higher, and the domestic research to low melting point is also in laboratory stage, be difficult to realize industrialization scale operation, therefore the nylon 6 obtaining low melting point by modification is emphasis of current research, it has many premium propertiess, but also there is shock strength difference, the shortcomings such as resistance toheat difference, therefore also need by filling on the basis of low melting point nylon 6 matrix, strengthen, copolymerization, the method modification low melting point nylon 6 such as blended, increase the popularity of application.

Summary of the invention

The object of this invention is to provide ageing-resistant nylon composite materials of a kind of damping and preparation method thereof.

In order to realize object of the present invention, the present invention is by following scheme implementation:

The ageing-resistant nylon composite materials of a kind of damping, is made up of the raw material of following weight part: antioxidant MB 2-3, ethylene-propylene copolymer 1-2, active calcium silicate 7-10, benzotriazole 3-4, barium stearate 0.5-1, paraffin 0.5-1, nylon 69 0-100, lithium chloride 2.5-3.2, epoxy resin E513-9, antioxidant 1010 0.3-0.5, sodium lignosulfonate 0.5-1, EVA emulsion 10-15, ethyl acetate 60-80, Viscotrol C 1-3, ethylene/vinyl alcohol copolymer powder 4-7, distilled water 15-30;

The ageing-resistant nylon composite materials of a kind of damping of the present invention, be made up of following concrete steps:

(1) mixing of ethyl acetate, distilled water and EVA emulsion is added in ultrasonic wave, ultrasonic disperse is even, add active calcium silicate, benzotriazole and antioxidant MB again in 80-90W ultrasonic disperse 10-15 minute, after end, mixture is heated to 70-90 ° of C and keeps 2-3 hour, stirring and refluxing in the process, then stops heating by product filtration, washing, dry for standby;

(2) mix after Viscotrol C thermal dehydration with ethylene/vinyl alcohol copolymer powder, under 180-200 ° of C, activation treatment 10-15 minute is carried out to the product of step (1), be cooled to room temperature after terminating for subsequent use;

(3) by Lithium chloride (anhydrous) and nylon 6 dry 7-8 hour under 120 ° of C and 80 ° C respectively, dried Lithium chloride (anhydrous), nylon 6 and epoxy resin E51 are mixed, be added to extruding pelletization in twin screw extruder again, heating and temperature control, at 180-240 ° of C, obtains modification of nylon 6 particle;

(4) particle of step (3), paraffin and antioxidant 1010 are added to the mixed 3-10 minute of heat in high-speed mixer, heating and temperature control, at 70-80 ° of C, obtains hot batch mixing;

(5) particle of step (4) is added in cold mixer, add material and all the other surplus materialss that step (1) obtains when temperature is reduced to room temperature, after being uniformly mixed 5-10 minute, transfer to that Heating temperature is 220-250 ° of C, screw speed is carry out melting mixing granulation in the twin screw extruder of 180-300 rev/min.

Advantage of the present invention is: the present invention adopts ethylene/vinyl alcohol copolymer to activate and is coated on reinforcement surface, add the consistency between reinforcement and nylon 6, avoid the reduction of the mechanical property of nylon 6 own, the active calcium silicate added improve goods heat-resisting, flux, the water absorbing properties of dielectric properties and reduction nylon, nylon composite materials damping of the present invention is good, reduce noise, ageing resistance is good, can time of delaying retrogradation, increase work-ing life, reduce use cost, simultaneously easy to process, meet scale operation demand.

specific embodiments

Below by specific examples, the present invention is described in detail.

The ageing-resistant nylon composite materials of a kind of damping, is made up of the raw material of following weight part (kilogram): antioxidant MB 2, ethylene-propylene copolymer 1, active calcium silicate 9, benzotriazole 3, barium stearate 0.8, paraffin 0.6, antioxidant 1010 0.4, sodium lignosulfonate 1, nylon 69 7, lithium chloride 3, epoxy resin E516, EVA emulsion 15, ethyl acetate 80, Viscotrol C 2, ethylene/vinyl alcohol copolymer powder 6, distilled water 30;

The ageing-resistant nylon composite materials of a kind of damping of the present invention, be made up of following concrete steps:

(1) mixing of ethyl acetate, distilled water and EVA emulsion is added in ultrasonic wave, ultrasonic disperse is even, add active calcium silicate, benzotriazole and antioxidant MB again in 90W ultrasonic disperse 10 minutes, after end, mixture is heated to 90 ° of C and keeps 3 hours, stirring and refluxing in the process, then stops heating by product filtration, washing, dry for standby;

(2) mix after Viscotrol C thermal dehydration with ethylene/vinyl alcohol copolymer powder, under 190 ° of C, activation treatment is carried out 10 minutes to the product of step (1), be cooled to room temperature after terminating for subsequent use;

(3) by Lithium chloride (anhydrous) and nylon 6 under 120 ° of C and 80 ° C dry 8 hours respectively, dried Lithium chloride (anhydrous), nylon 6 and epoxy resin E51 are mixed, be added to extruding pelletization in twin screw extruder again, heating and temperature control, at 220 ° of C, obtains modification of nylon 6 particle;

(4) particle of step (3), paraffin and antioxidant 1010 are added to heat in high-speed mixer to mix 10 minutes, heating and temperature control, at 80 ° of C, obtains hot batch mixing;

(5) particle of step (4) is added in cold mixer, add material and all the other surplus materialss that step (1) obtains when temperature is reduced to room temperature, after being uniformly mixed 10 minutes, transfer to that Heating temperature is 240 ° of C, screw speed is carry out melting mixing granulation in the twin screw extruder of 250 revs/min.

Performance perameter after nylon composite materials irradiates 500h under xenon lamp in the present embodiment is as follows:

Tensile strength (MPa): 63.9;

Flexural strength (MPa): 88.2;

Notched Izod impact strength (kJ/m2): 65.1;

Vicat softening temperature (° C): 71;

Elongation at break keeps (%): 96.2.

Claims (2)

1. the ageing-resistant nylon composite materials of damping, it is characterized in that, be made up of the raw material of following weight part: antioxidant MB 2-3, ethylene-propylene copolymer 1-2, active calcium silicate 7-10, benzotriazole 3-4, barium stearate 0.5-1, paraffin 0.5-1, nylon 69 0-100, lithium chloride 2.5-3.2, epoxy resin E513-9, antioxidant 1010 0.3-0.5, sodium lignosulfonate 0.5-1, EVA emulsion 10-15, ethyl acetate 60-80, Viscotrol C 1-3, ethylene/vinyl alcohol copolymer powder 4-7, distilled water 15-30.

2. the ageing-resistant nylon composite materials of a kind of damping according to claim 1, is characterized in that, be made up of following concrete steps:

(1) mixing of ethyl acetate, distilled water and EVA emulsion is added in ultrasonic wave, ultrasonic disperse is even, add active calcium silicate, benzotriazole and antioxidant MB again in 80-90W ultrasonic disperse 10-15 minute, after end, mixture is heated to 70-90 ° of C and keeps 2-3 hour, stirring and refluxing in the process, then stops heating by product filtration, washing, dry for standby;

(2) mix after Viscotrol C thermal dehydration with ethylene/vinyl alcohol copolymer powder, under 180-200 ° of C, activation treatment 10-15 minute is carried out to the product of step (1), be cooled to room temperature after terminating for subsequent use;

(3) by Lithium chloride (anhydrous) and nylon 6 dry 7-8 hour under 120 ° of C and 80 ° C respectively, dried Lithium chloride (anhydrous), nylon 6 and epoxy resin E51 are mixed, be added to extruding pelletization in twin screw extruder again, heating and temperature control, at 180-240 ° of C, obtains modification of nylon 6 particle;

(4) particle of step (3), paraffin and antioxidant 1010 are added to the mixed 3-10 minute of heat in high-speed mixer, heating and temperature control, at 70-80 ° of C, obtains hot batch mixing;

(5) particle of step (4) is added in cold mixer, add material and all the other surplus materialss that step (1) obtains when temperature is reduced to room temperature, after being uniformly mixed 5-10 minute, transfer to that Heating temperature is 220-250 ° of C, screw speed is carry out melting mixing granulation in the twin screw extruder of 180-300 rev/min.